Geosense MEMS DPI I User manual

MEMS Digital Portable
Horizontal Inclinometer
I
N
S
T
R
U
C
T
I
O
N
M
A
N
U
A
L

V1.1 MEMS Digital Portable Horizontal Inclinometer
09/02/2022
1
TABLE OF CONTENTS
................................................................................................................................................................0
1. VERSION CONTROL ......................................................................................................................3
2. INTRODUCTION .............................................................................................................................3
2.1. GENERAL DESCRIPTION .........................................................................................................................4
2.2. THEORY OF OPERATION.........................................................................................................................5
2.3. THE MEASUREMENT OF INCLINATION.....................................................................................................7
3. CONFORMITY.................................................................................................................................8
4. MARKINGS ...................................................................................................................................10
5. DELIVERY .....................................................................................................................................11
5.1. PACKAGING...........................................................................................................................................11
5.2. HANDLING .............................................................................................................................................11
5.3. INSPECTION / FUNCTIONALITY CHECK READINGS ...............................................................................11
5.4. STORAGE ..............................................................................................................................................12
6. INCLINOMTER CASING INSTALLATION THEORY ...................................................................12
6.1. BASELINE ..............................................................................................................................................12
6.2. DESIGN OF INCLINOMETER CASING .....................................................................................................12
6.3. ZONE OF INFLUENCE ............................................................................................................................13
6.4. OPERATIONAL MODES..........................................................................................................................14
i. Installation where both ends are accessible .................................................................................. 14
ii. Installation where single end is accessible .................................................................................... 14
7. OPERATION..................................................................................................................................16
7.1. SYSTEM COMPONENTS ........................................................................................................................16
7.2. SYSTEM COMPONENT DESCRIPTIONS .................................................................................................17
7.3. BATTERY CHARGING ............................................................................................................................19
7.4. INSTALLING THE INCLINOMETER APPLICATION ON THE ASD...............................................................21
8. SYSTEM ASSEMBLY AND OPERATION....................................................................................22
8.1. ASSEMBLING THE SYSTEM ...................................................................................................................22
9. USING INCLOPRO SOFTWARE APPLICATION (ANDROID) ....................................................37
9.1. RECORDING A SURVEY.........................................................................................................................37
9.2. VIEWING DATA......................................................................................................................................46
9.3. INITIAL / BASE SURVEYS.......................................................................................................................48
9.4. UPLOAD SELECTED SURVEY TO FTP ..................................................................................................50
9.5. EMAIL/SAVE TO PHONE/BLUETOOTH...................................................................................................50
10. DATA HANDLING .....................................................................................................................51
10.1. DATA FORMAT ..................................................................................................................................51
10.2. DATA REDUCTION.............................................................................................................................54
10.3. TEMPERATURE CONSIDERATIONS....................................................................................................57
11. MAINTENANCE.........................................................................................................................58
11.1. LUBRICATION AND CLEANING ...........................................................................................................58
11.2. STORAGE ..........................................................................................................................................59
11.3. CALIBRATION ....................................................................................................................................59
12. TROUBLESHOOTING...............................................................................................................59
12.1. PROBE ..............................................................................................................................................59

V1.1 MEMS Digital Portable Horizontal Inclinometer
09/02/2022
2
12.2. ASD READOUT .................................................................................................................................61
12.3. REEL AND CABLE..............................................................................................................................62
SPECIFICATIONS ...............................................................................................................................63
13. SPARE PARTS..........................................................................................................................65
14. RETURN OF GOODS ................................................................................................................66
14.1. RETURNS PROCEDURE ....................................................................................................................66
iii. Chargeable Service or Repairs.................................................................................................... 66
iv. Warranty Claim............................................................................................................................... 66
14.2. PACKAGING AND CARRIAGE .............................................................................................................67
14.3. TRANSPORT & STORAGE..................................................................................................................67
15. LIMITED WARRANTY ...............................................................................................................67

V1.1 MEMS Digital Portable Horizontal Inclinometer
09/02/2022
3
1. VERSION CONTROL
Version
Date
Author
Approved
Released
V1.0
V1.1
Feb 2022
TB
TC
GC
2. INTRODUCTION
This manual is intended for all users of the Horizontal Portable Inclinometer Systems
manufactured by Geosense® and provides information on their operating principles,
conventions, operation and maintenance.
It is VITAL that all personnel responsible
for the use of the Portable Inclinometer
READ and UNDERSTAND
this manual, prior to working with the equipment

V1.1 MEMS Digital Portable Horizontal Inclinometer
09/02/2022
4
2.1. General Description
The Geosense® Portable Inclinometer equipment is an environmentally sealed
assembly that is used to accurately and reliably register changes of inclination within
specialist inclinometer casing. The assembly comprises a probe connected to a
graduated cable that is held on a cable reel. The reel is Bluetooth enabled for
wireless connection to an Android Smart Device (ASD).
Inclinometer Casing can be installed or included in many types of structures and
monitoring regimes. It can be within vertical, inclined or horizontal installations.
This manual is focused on the horizontal Inclinometer System
Common applications include the following:
Embankment stability monitoring
Settlement/heave profile monitoring
Dam monitoring
Particular features of all Geosense® Portable Inclinometer Systems are:
Reliable long-term performance
Ruggedness; suitable for demanding environments
Bluetooth, cable free interconnection
High accuracy
Digital output and full EMI shielding
Designed with the user in mind
The Geosense® Inclinometer sensors are based upon Micro Electro Mechanical
Systems technology (MEMS). The MEMS accelerometer sensors in the Inclinometer
Probe are configured to measure changes in rotation (tilt or inclination). The probe
contains two sensors mounted orthogonally to measure inclination in the ‘A’ axis
direction (in line with the wheels) and rotation in the perpendicular, ‘B’ axis, direction.
Electronic circuitry within the probe interrogates its sensor and the corresponding
output is converted from an Analogue to a Digital signal, making it particularly
suitable for the demanding environments of geotechnical and civil engineering
applications.
Geosense® Inclinometer probes carry ‘onboard’ calibration data so that probe /
cable / reel / readout combinations are all interchangeable. Each element also has a
unique serial number.
Portable inclinometer systems are commonly used where monitoring is to be
infrequent or automated monitoring is too expensive. These systems are used to
determine the change in inclination of the inclinometer casing at intervals along its
length (commonly 0.5m or 2ft). This information is processed to generate a profile of
the inclinometer casing, with respect to horizontal and subsequent profiles being

V1.1 MEMS Digital Portable Horizontal Inclinometer
09/02/2022
5
compared with each other to detect changes.
2.2. Theory of Operation
Special tubes, commonly referred to as Casing or Access Tubes, are installed into or
fixed onto the structure or formation to be monitored. (see Geosense® Inclinometer
Casing Installation Manual).
Inclinometer casing is a specially machined ABS tube that has 4 equally spaced,
parallel ‘keyways’ in its inner surface and a reference ‘rib’ on its outer surface. The
inclinometer casing is designed to move with the structure/formation into which, or
onto which it is fixed, if the structure changes.
The Portable Inclinometer System is used to detect and quantify any changes in the
‘shape’ of the installed casing. For horizontal casing, changes in the vertical
direction can be detected. The inclinometer probe, connected to its cable, is inserted
into the inclinometer casing with its wheels located in the A+ / A- keyways (Figure 1:
Schematic of inclinometer casing keyways).
Casing for the Horizontal Inclinometer MUST
be installed so that one pair of keyways is VERTICAL
B+
B-
A+
A-
Figure 1: Schematic of inclinometer casing keyways

V1.1 MEMS Digital Portable Horizontal Inclinometer
09/02/2022
6
The Geosense® Digital Horizontal Inclinometer Probe houses a pair of extremely
sensitive Micro Electro-Mechanical System (MEMS) Tilt Sensors. In the Horizontal
probe, the ‘A’ axis is mounted with its ‘Null’ or ‘Zero’ output at 0o degrees from
horizontal. The two sensors are mounted orthogonally so that they can measure the
orientation of the probe along its length and the ’Roll’ of the probe about its axis,
simultaneously. The former is the primary measurement and referred to as the ‘A’
axis. The other axis is included for installation integrity purposes only and does not
form part of the data calculations. It is referred to as the ‘B’ axis (see sketch).
The probe is attached to a highly robust and flexible support / signal cable that is, in
turn, connected to a portable cable reel. The cable reel includes a Bluetooth
communication module and a re-chargeable battery power supply. The cable is
fitted with ‘crimped’ cable markers that securely identify 0.5 metre (or 2ft) intervals
along its length.
The Cable Reel Bluetooth module is used to connect to an Android Smart Device
(ASD) or Ruggedized Android Mobile Phone to the probe. The specially
dedicated horizontal Inclinometer software on the ASD first connects to the reel
modules and then to the probe at the end of the cable. Once connected the ASD
displays the inclination of the probe in mm.
The displayed values represent the value of ‘L Sin θ’ (Figure 2: L Sin θ and roll
planes of measurement) in the ‘A’ direction and Degrees of ‘Roll’ in the ‘B’ direction.
Figure 2: L Sin θ and roll planes of measurement

V1.1 MEMS Digital Portable Horizontal Inclinometer
09/02/2022
7
2.3. The Measurement of Inclination
To generate a profile of an installed inclinometer casing, a series of interconnected
readings are recorded. The probe is orientated so that the fixed wheel is facing
downwards and inserted into the casing with the sprung upper wheels in the
corresponding upper groove. It is lowered to the far end of the casing and
suspended on one of the metallic cable markings.
At the far end of the casing, with the probe suspended (not resting on the bottom), a
reading is recorded. The probe is then lifted up by the distance equivalent to its
‘gauge length’ (see sketch) and another reading is taken. This process is repeated
up the full length of the casing.
To minimise the issue of ‘Human Error’, Geosense® has introduced the option of
‘Automatic Inclinometer Data Acquisition’ into its proprietary software. This utilises
the stability and accuracy of the sensors together with the intelligence of the ASD to
allow the software to determine when the readings are considered stable, record
them, instruct the user to move to the next reading elevation and sense when this
has been carried out.
Essentially, the user has only to respond to a series of audible prompts, thereby
almost removing the risk of errors caused by distraction, haste or miss-recording.
The uppermost wheel, denoted by the ‘A+’ on the probe, is the direction uppermost
wheel.
A ‘+’ change in the computed Displacement indicates a change in the inclination in
the ‘+’ direction.
In almost all cases, inclinometer surveys are conducted to record a profile from the
base of the inclinometer tube towards the top, even if the movements are to be
computed differently (from the ‘Top Down’). Commonly, monitoring assumes the
base of the tube is ‘beyond the zone of expected movements’, so movement data is
computed accordingly. There are some circumstances where this assumption does
not apply so movements are computed from the top downwards where the
movement of the top of the tube can be determined by other measuring systems.
Inclinometer surveys are almost NEVER conducted from the top towards the base.
Three surveys are normally conducted to establish the Base Data File (Initial Data).
The values are either averaged to generate the Base Data or a ‘Mean Data Set’ is
selected to represent the Base Data.

V1.1 MEMS Digital Portable Horizontal Inclinometer
09/02/2022
8
3. CONFORMITY
Geosense Ltd
Nova House
Rougham Industrial Estate
Rougham, Bury St Edmunds
IP30 9ND
Email: [email protected]o.uk
Web: www.geosense.co.uk.
Declaration of Conformity
We Geosense® Ltd at above address declare under our sole responsibility that the Geosense®
products detailed below to which this declaration relates complies with protection requirements of the
following harmonized EU Directives:
•Low Voltage Directive 2014/35
•Electromagnetic Compatibility Directive 2014/30/EU
•Radio Equipment Directive 2014/53/EU
•Restriction on the use of certain Hazardous Substances (RoHS2) 2017/2102/EU
Equipment description MEMS Digital Portable Inclined Inclinometer
Make/Brand Geosense
Model Numbers DPI I
Compliance has been assessed with reference to the following harmonised standard:
EN 61326-1:2013 Electrical equipment for measurement, control and laboratory use.
EMC requirements. General requirements.
EN 61010 (2010) Safety requirements for electrical equipment for measurement, control, and
laboratory use. General requirements.
A technical file for this equipment is retained at the above address.
Martin Clegg
Director
Martin Clegg
Director
15th September 2021

V1.1 MEMS Digital Portable Horizontal Inclinometer
09/02/2022
9
Geosense Ltd
Nova House
Rougham Industrial Estate
Rougham, Bury St Edmunds
IP30 9ND
Email: [email protected]o.uk
Web: www.geosense.co.uk.
Declaration of Conformity
We Geosense® Ltd at above address declare under our sole responsibility that the Geosense®
products detailed below to which this declaration relates complies with protection requirements of the
following harmonized EU Directives:
We Geosense Ltd at above address declare that the equipment detailed below is in conformity with
the following UK Regulations and their corresponding Statutory Instruments:
•Electrical Equipment (Safety) Regulations 2016
•Electromagnetic Compatibility Regulations 2016
•Radio Equipment Regulations 2017
•Restriction on the use of certain Hazardous Substances in Electrical & Electronic Equipment
Regulations 2012
Equipment description MEMS Digital Portable Inclined Inclinometer
Make/Brand Geosense
Model Numbers DPI-I
Compliance has been assessed with reference to the following harmonised standard:
EN 61326-1:2013 Electrical equipment for measurement, control and laboratory use.
EMC requirements. General requirements.
EN 61010 (2010) Safety requirements for electrical equipment for measurement, control, and
laboratory use. General requirements.
A technical file for this equipment is retained at the above address.
Martin Clegg
Director
15th September 2021